Office



` `axis ofhrotatio *tical "sectlon operation c c y 1 theabutment ttedtothe cylinder ountyof Monroe and `:have invented a. new

` H c. Movementin Rotary Pumps;` nd do hereby` declare that the following U isfa 1full, clear, andfexact description of the same, referencebeingfhadto the accompanyf rming part. of this specifica- 'a'ieii c "Seesen er la `@my nip ta planefperpendicular to the Fig.. 2, fis `an axial ver- Same, Fis, 3, 'iS-a 191iof` one ofthe pistons. Fig.

` f the fthe same. Fig.,6,

evvs `of thepacking `1g. is an, outer face` ofthefpi'ston`-` y Fig. c Nsa'me. Figl 9, is a the packing of one .ffrllma f eferenceindicate core` several figures. sists in certain improveo ruction of andi modes of listing-the packing of the pisents, whereby leakage` isl prevented and `greater cond" for adjustment.

ined inthe `am; t@ 1 ap:

will proceed to describe o the drawings."

is the rotating cylinade of the sannepiece 'gidly attached tothe drum has radialslots "receiving between. them one stonsdand thjfslotj in y c arm c, provided at e end hereofsto-#g vefsteadiness in` the ction and I @duction ofY the bearing H `f the abutment.` ralf-hub 0r cam,

` :s Tirs PATENT oFFIOE.

ROTARY PUMP. c

afiaorileftrs Patent No. 35,388', dated May a7,- 1862.

. g y betvveenthe outer periphery of which and FRANKLIN B. PIERCE,

the inner periphery ofthe cylinder or shell A, the pistons rotate, corresponding in form With the form of theA cylinder and abutment.

\ `The pistons D, D, shown `in Figs. l, 2,' 3, 4, 5, 6,'have`each threepacking-pieces of brass or other soft `metal or alloy, viz., `a face piece J andtvvo end pieces K, K, all ofvvhich are itted'into deep grooves in the bodies D, D, thereof. The end-pieces K, K,

are mortised for the reception of tenons cl, d, c

at the ends of theface piece VJ, andthey are "furnished` each with a tenon e, entering a mortisein ,one end of the face piece and -vvithsquare lugs f; f, on opposite sides enterling notches of corresponding form in the` `body D. Both the face Apiece J, and the `endpiecesA K, K, have flanges g, g, Which lap over the body. D, as sho-Wn in Figs. l,

and 4,- so that the Wholel face ofthe piston which is toward the inner peripherical surface of the cylinder is composed partly of the packing piece J, and partly `of those 7The inner edges of the end pieces K, are

packing of the piston to be set out at once. The angle of the edges h, h, and ,2', should `be Such as will enable both the relative Wear of theouter faces and ends of the pistons to 'be compensated for in a proper degree.` The adjustment of `fthe packing is. effected `by `means of one or more screws j, j, screwing through tapped holesin the piece J ,7 and lof the packing. pieces,thescrewing in of the c Y u said screw or screws settingoutthe piece e shaft,

` pist-ons, by means of screws Ze, `7c, screwed y f""tlirough the Whole in a transverse direction,`

J. fThe packing pieces are secured in the the saidscreWs Vpassing through slots 7a', c,

in the piece J ,andslots la?, 702, inthe piecesV K, K, the said slots Vbeing at rightjangles to each other. The slots la', k', are covered by inclined as shown at h, 77 in Figs. 3, and "G, c and the edges v1, ,of the face piece J, are inclined toxcorrespond in order that-in setting outthe piece J, to adjust it or compensate for Wear it may act as a Wedge against thetivo pieces K, K, and set them out at the same time, thus causing the whole of the `bearing against the `bottom ofv the groove l provided in the body D, forthe reception thepiecesK.K and thosecz, k2, by the body` of thepiston so that Water or steamcannot leak through them. The lugs f, serve to keep f the end Ypieces K, K, from moving outilo' .Ward @Ward the inner periphery of thecyl-V y inder and the tenons e, e, are made to cover the passage through the piston that would otherwise be left open by the moving out of the end pieces K, K.

Each piston is iitted with a roller L, to run on the hub or cam I, said roller working on a pin or axle Z, inserted through the ends of the body D. The packing piece J, has its ends so formed as shown at Z, Z, in Figs. 3, and G, that it will cover the ends of the axle Z, and so secure it and the roller in place.

One of the results of the above construction and mode of fitting the packing pieces of the pistons is that the face piece J, as it is moved outward is always well supported at its ends by the end pieces K, K, which onlyinove toward the ends of the cylinder and whose flanges g, g, always have a bearing on the edges of the body D.

To provide for setting out the piston packing without removing the pistons from the cylinder or taking oit the cylinder heads one or more holes according to the number of screws j, j, in each piston, are made in the cylinder at a suitable point or points to permit the introduction of a screw driver or other implement to turn the said screw or screws, which are brought opposite the said holes by turning the cylinder to bring the pistons one after the other to the required position. The said hole or holes in the cylinder are closed except at the time of adjustment of the screw or screws j, j, by one or more screw plugs M, M, or their equivalents.

I propose to use packing in the slots of the piston druln. The drawing (Fig. 1) only represents it applied on one side of one piston; but it is to be applied on the back side of each piston, and in pumps that are required to be reversed for any purpose it should be applied on each side of each piston. This packing consists of a strip N, of brass or other soft metal tted into a groove provided for its reception in the side of the piston slot, said piece being made with a flange n, on one side as shown in Fig. l, or on both sides or without flanges on its sides and its back is grooved for the reception of a wedge piece P, whose form is best shown in Fig. 9, the bottom or back of its groove having inclinations on its surface to correspond with the inclinations on the face of the wedge piece, the back of the said wedge piece having a bearing against the bottom or back of the groove in the side of the piston slot.

The wedge piece is moved longitudinally to set out the packing N, by means of a screw p screwing through a tapped hole in one end of the piston drum, said screw being reached by a screw-driver or other suitable tool inserted through a. suitably arranged hole in one of the cylinder heads, such hole being plugged up by a screw plug Q, at all times but when the packing pieces N, are to be set out, when it is removed and the screws p, belonging to the several packing pieces are one after the other brought opposite to the said hole to be screwed up against their respective wedge pieces.

In order to prevent the packing pieces N, from dropping into the piston-slots in case of the removal of the pistons therefrom they are each secured in place by a screw g, which screws into the drum but passes through a slot g, in the packing piece the length of the slot being suflicient to enable the packing to move outward toward the piston till entirely worn out.

By grooving the packing piece N, for the reception of the wedge piece P, or in other words providing the said packing piece with flanges r, r, on each side of the wedge piece, the open space which would be left at one or other end of orat both ends of the wedge piece within the groove provided in the drum for the reception of the packing piece is covered, so that the water or steam cannot so easily pass through it as it could if the said space were not so covered. This space is shown at the left hand of Fig. 9 in front of the wedge.

The abutment packing piece H, has applied and fitted to it a wedge piece R, substantially like the wedge piece P, applied to the piston-slot packing piece N; but this packing piece H, is made with two flanges s, s, (Fig. l) at a distance apart greater than the width of the wedge piece and grooves are provided in the abutment E, for the above langes such grooves forming, of parts of the abutment E, on each side yoi" the main groove which receives the wedge piece, flanges t, t, which enter grooves provided in the packing iece H. By means of the double set of anges s, s, t, thie passage of the water through the spaces left at the end or ends of the wedge piece, is more eiectually and perfectly prevented than it would be by a Single pair of flanges like those r, r, of the piston slot packing strip. The single pair of flanges will be very effective in pumps. The wedge piece R, of the abutment packing is operated to set up the packing piece H, by means of a screw u, (Fig. 2) screwing through a tapped hole in one of the cylinder heads, and this screw hole is closed at all times but while setting up the packing, by means of a screw What I claim as my invention and desire to secure by Letters Patent, is:

l. The construction of the piston packing pieces J, and K, K, with oblique surfaces z', z', and 7L, h., fitting together substantially as described whereby the piece J, in being set out is caused to act like a wedge upon K, K, and set them out also as herein set forth.

2. In combination with the foregoing the e i, `tenonsje, e; `corlslrlleted and arranged substantally as and for the purpose herein i "stantiallygas and for the. purpose` herein specified.

p specified. s i Y p Y 5. The packing pieces H, and N, with 3.1The setting `ou'oofwthe"pieces J, byv` an'gess, t, 1",'substanta11y'as and for the i `Ineens ofiet screwsy', j, appliegind operpurpose herein sei'J forth.

latin int emenner erein speci e Y i I Lgflhe oomloinationof the abutment and FRANKLIN B' PIERCE' piston-slot `packing pieces H, and N, or Witnesses: 1'

TIMOTHY FRY'E,

` either of themwiththe Wedgepeces R, P,

IsAAo DAVIS.

p e `L0` andjsorewsu, p," applied and operating sub- 

